Hinge.



(I. W. TRINKAUS.

HINGE.

APPLICATION FILED FEB. 10. 1915.

1 ,142,542 Patel fined June 8, 1915.

CHARLES WILLIAM TBINKAUS, OF CATONSVILLE, MARYLAND.

HINGE.

I Specification of Letters Patent.

- Application filed. February 10, 1915. Serial No. 7,255.

To all whom it may concern:

Be it known that I, CHARLES WILLIAM TRINKAUS, a citizen of the United States of America, and resident of Catonsville, Baltimore county, Maryland, have invented certain Improvements in Hinges, of which the following is a specification.

This invention relates to certain improvements in that class of hinges in which the loose pintle can be withdrawn from the leaves to allow of their disengagement, but

only after the leaves are placed in certain relative positions. In the present invention this is accomplished by providing each leaf of the hinge with a pin that projects through the wall into the cavity of its knuckle, the two pins being so placed that when the leaves are partially open they are brought into vertical alinement. With the leaves constructed and arranged as described, I employ a pintle having a circumferential groove adapted to register with and receive the end of the upper pin, and a groove which extends from the circumferential groove to the lower end of the pintle.

When the door to which the hinge is applied is shut the leaves are fully closed and the pins are then out of alinement and the pintle cannot therefore be withdrawn to admitof the separation of the leaves, but upon the door being opened a predetermined distance, the pins are brought into alinement, and the pintle can be withdrawn and the two leaves separated to admit of the removal of the door from its frame.

In the further description of the said invention which follows, reference is made to the accompanying drawing, forming a part hereof, and in wh1ch:

Figure 1 is an lnner and Fig. 2 a section of Fig. 1 taken on the broken line w-m. Fig.3 is a similar section taken on the broken line y y. Fig. 4 is a sectional view in perspective, illustrating the position of the leaves when the pins are in vertical alinement, and Fig. 5 a perspective face view of the improved hinge with its leaves fully extended,

view of. the upper portion of the hinge when the leaves are in the positions shown in Fig. 4. Fig. 6 is a perspective view of a part of the pintle, showing its circumferential and longitudinal grooves before referred to.

. Referring now to the drawing, 1 and 2 are the leaves of the hinge, and a and b theirv respective knuckles. The lower knuckles a and b are provided withvpins c and (Z respectively, which extend through the wall of the knuckles and project a limited distance into the pintle cavity; and these pins are brought into vertical alinement when the leaves are partly open as shown in Figs. 4 and 5.

4 is a pintle having the circumferential groove 6 which registers with and receives the end of the pin 0, and f a vertical groove (see Fig. 6) which extends from the groove Patented June 8,191.5.

e to the end of the pintle and receives the lower pin d.

Supposing a pair of hinges constructed as described to be applied to a door, and it is required to remove the door from its frame, the door is opened until the leaves of the hinges are in the position shown in Figs. 4 and 5, and theindicating marks g on the upper knuckles a and I) register as shown in Fig. 5, when the pintle can be withdrawn and the leaves separated I claim as my invention A hinge comprising a pair of leaves having engaging knuckles, two of the opposing knuckles, having pins which project into the pintle cavity and are brought into vertical the leaves are partially closed, and a pintle having a circumferential groove adapted to engage with and receive one of the pins, and a vertical groove which alinement when extends from the said circumferential groov to the end of the pintle.

CHARLES WILLIAM TRINKAUS.

Witnesses:

H. FINDLAY FRENCH, WM. T. HOWARD.

Copies of this patent may be obtained 'for' five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

